Ch6.01 Densitometer

Chapter 6
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Special functions
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Special Functions
All additional and special functions are described in Chapter 6.
Some of these functions are scanner specific and may behave differently depending on the combination of the software and hardware and some menus may differ or not be displayed at all.
6. Special Functions
193
6.1 The Densitometer
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6.2 Improving the Sharpness of Artwork
199
6.3 De-screening an image*
205
6.4 GANE®
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6.5 Line Art Scans (1 Bit)*
215
6.6 Multiple Sampling
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6.7 NegaFix - Scanning Negatives*
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6.8 The Use of Various Film Holders* for Film Scanners*
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6.9 File formats in SilverFast
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6.10 Focussing the Scanner*
249
6.11 Description of the Special Functions of
SilverFastHDR…, and SilverFastDC…
253
6.12 SilverFastJobManager
343
6.13 SilverFastSRD (Dust- and Scratch Removal)
369
6.14 SilverFastAACO Auto-Adaptive Contrast Optimization 399
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6.15 Clone Tool
401
6.16 PrinTao
405
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6. Special Functions
6.1 Densitometer
For precise monitoring of density values
6.2 Unsharp Masking
To enhance the image with better sharpness (detail contrast)
6.3 Descreening
To eliminate possible moire patterns when scanning printed images.
6.4 SilverFastGANE
Filter for reduction of grain and noise structures in film scans
6.5 Line art
To scan black and white samples (not greyscale)
6.6 Negative Scans
To scan greyscale or colour negatives.
6.7 Multisampling
Multiple scan-runs to eliminate noise.
6.8 Using the various film holder with film scanners
APS film adapter, film strip holder, slide feeder.
6.9 File formats in SilverFast
For scanning black&white images as well as colour negatives.
6.10 Foccusing the Scanner
For optical focussing of the scanner.
6.11 SilverFastDC…, -HDR…
Scanner independent SilverFast products and their differences to SilverFastAi.
6.12 SilverFastJobManager
The high-end development of batch scanning.
6.13 SilverFastSRD / SilverFastiSRD
Smart removal of defects; remove scratches and dirt by the software.
6.14 SilverFast AACO
Auto-adaptive contrast optimization.
6.15 Clone tool
Retouching tool.
6.16 PrinTao
The extended print dialogue of SilverFast…Studio.
6.17 Image settings
Important image parameters in an overview; including real-time output histogram in
SilverFast…Studio.
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6.1 The Densitometer
Colour models supported in the densitometer are RGB, CMY, LAB,
CMYK, K, LCH and HSL.
Monitor of Before and After Values
The densitometer shows the unchanged values in the left column.
In the right column, the changed values (image auto-­adjust, gradation etc.) are shown.
”Before“ colour
*SilverFast…SE versions
The densitometer values in
SilverFast…SE versions only show the
RGB and K values..
”Before“
CMYK values
“After” colour
“After”
CMYK values
Densitometer is Displayed in the Gradation and
the Selective Colour Correction Dialogue
Fix a densitometer point within the scan frame. While opening the
gradation or selective colour correction dialogue, the densitometer
switches to a threefold monitor.
When corrections are done, the third (right) column shows the
altered value in respect to the second column.
Acknowledging the gradation dialogue with clicking “OK” will
switch the densitometer back to two columns. The third column
will become the second column.
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Switching the Densitometer
All densitometers may be switched to a different colour space by
two methods:
”Toggle switch“ by clicking on to the measurement columns of
any densitometer, it will jump to the next colour space mode.
Keep clicking here until the desired colour space is shown.
Directly switching in the context menu: Hold down the “Ctrl” key
and click into any of the measuring value cells of the densitometer. A pop-up window opens and by selecting another colour
space the measured values in the densitometer will be converted to the values of the selected colour space.
CMYK Values Visible on the Prescan
(refer also: „Permanent Softproof, page 91)
In all Full Versions of SilverFast, the CMYK output values can
already be seen on the prescan itself.
In case no ICC separation profile is chosen in SilverFast, the
­Photoshop separation settings will be used for the densitometer
display. If, however, an ICC profile is selected this profile will be
used for the densitometer display. This is done for both the
floating single densitometer as well as the multiple densitometer
„fixed pipette“.
If a CMYK profile is selected in SilverFast, a small button in C, M, Y
and K colour is shown left of the colour “before/after“ display in the
densitometer window. This button is the activation of the softproof
display on the monitor. Simply press this button to activate or deactivate this function. The condition fort his is that the scan-button
shows ”Scan CMYK“. After a short calculation, the CMYK colours
will be simulated on the prescan.
By this method, it is possible to predict the final separation values
derived from the Photoshop- or the ICC profiles.
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Gamut Warning
Warning signal when colour at measured position cannot be
printed with CMYK colours. The colour cell above right column will
be splited horizontally, where the upper part displays the current
monitor colour and the lower part displays the colour which would
be the printable colour.
Gamut Warning
Multiple Densitometer (Multiple FixPip)
By pressing the ”Shift“ key and clicking on the scan image, up to
four individual measurement points can be placed and fixed on
any spot of the image. In order to delete these points, simply repeat
the procedure. A fixed measurement point is marked in the prescan window by a small numbered circle.
The measuring values of these pipette measuring points will no
longer be shown in the densitometer window, but in their own
window. The windows will attempt to adapt to the number of measuring points, meaning they will change their size, depending on the
number of fixed points and the selected colour types (RGB, CMYK,
grey etc.).
The colour types can be adjusted for each pipette independently
of each other. The quickest way to switch is done using the context
menu (keep ”Ctrl“ key pressed and click on to the value display
column)
If all fixed points have been deleted, the window will close automatically. If the window is closed, all fixed points will automatically
be deleted.
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Transfer of the Brightest/Darkest Point to the
Multiple Densitometer
By clicking the white or black area in the icon for “darkest/lightest
point” while holding down the “Shift” key, the reading found by
SilverFast will be transferred to the window “fixed pipette”.
Good control of corner values can thus be assured.
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